Telephone handset housing panel



FIG. 1 is a top, front, and right side perspective view of a telephone handset housing panel showing our new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a left side elevational view; and,

FIG. 4 is a left side cross sectional view thereof.

The broken line showing of the rear panel in FIGS. 1-3 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a telephone handset housing panel, as shown and described. 